Question

Are all proteins polypeptides? Explain.

Answer 1

Yes. A protein is usually composed of 20 amino acids. A polypeptide is an umbrella term for something that is composed of two or more amino acids. So, all proteins are polypeptides.

Answer 2

Actually google says there are proteins made of only one amino acid so the sentence is wrong I checked it the day after asking the question

Answer 3

Uh oh, sorry about that!

Answer 4

But this website and my AP Bio class says otherwise: https://askabiologist.asu.edu/venom/building-blocks-protein

Answer 5

It says there are 21 amino acids that proteins can be made from but that doesn't mean its necessary to use all of them ;)

Answer 6

OH, okay that makes more sense!